Surgical retractor assembly with controlled rotation
US6241659A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A retractor blade mounts on a shaft having a controlled degree of rotation and swings down to grip and retract tissue from bone or a hard tissue structure. The retractor blade includes a blade portion and a handle portion which may be integrally joined or may fit together in a modular way to allow different blades to be removably and interchangeably affixed to the handle assembly. A dovetail may mount the blade in a plane substantially transverse or perpendicular to the shaft. The shaft translates within a multi-position locking mechanism to allow adjustment of the handle extension along one or more axes, while the in-plane swing of the blade about the shaft conveniently positions the tip of the blade under tissue to be retracted when bone or hard tissue impedes access along the retraction direction parallel to the axis of the shaft. The retractor handle has a regular cross-section with one or more protruding lobes or ridges extending along the axial direction such that the edge-to-edge diameter of the handle varies with angular position about the axis, and peaks at one or more lobes or opposed pairs of lobes so that the ridges jam by interference against the walls of a channel in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.